Outlet boxes for Ceiling Fans
Question: Out-of-balance fans? For outlet boxes that support ceiling suspended fans, does UL consider out-of-balance fans?
(No Ratings Yet)September/October 1998
(No Ratings Yet)Variances in Exit Signs
Question: Exit Signs I’ve noticed that the color, size, and visibility of exit signs varies greatly. Do UL requirements permit these variances?
(No Ratings Yet)
Overhead Line Design from Scratch—Part 4
In Part 3 (July/August issue) we determined the height of our structures and the strength of our structures and foundations to comply with the National Electrical Safety Code® (NESC®). The last step in the design of a high-voltage overhead line up to 50 kV to comply with the NESC is to design the guying.
(3 votes, average: 5.00 out of 5)
Substation Grounding
Not long ago I wrote an article on substation grounding for Electrical Business that raised the issue of whether one should interconnect the building reinforcing steel with the station ground electrode. A reader responded with the question of whether the best approach might be to ignore the rebar bonding.
(No Ratings Yet)Beinvenidos Mexico
Mexican electrical inspectors must now comply with accreditation, much the same as the ISO 9000.
(No Ratings Yet)
The Grounding Electrode
As metal piping is being replaced by plastic piping, we’re losing one of our best means of connecting electrical systems to the earth through low impedance.
(No Ratings Yet)
Services for Multi-Occupancy Buildings
In light of the 1999 Code changes, Phil Simmons takes a third look at multiple disconnects grouped in one location.
(No Ratings Yet)
